JP2022040530A - Fire-resistant wall - Google Patents

Abstract

To improve fire resistance performance while reducing material cost and construction cost of a fire-resistant covering material in a fire-resistant wall including a structural steel aggregate.SOLUTION: A fire-resistant wall comprises: a first and second finishing material constituting a wall surface; a first and second finishing material constituting a wall surface, and a structural steel frame material disposed between the first and second finishing materials so that a first gap part is formed between each of the first and second finishing materials; an opening formed in a direction intersecting the wall surface and penetrating the first and second finishing materials and a second gap part formed between the first and second finishing materials and not intervened by structural steel members; and a third finishing material facing the opening part and disposed so that a third gap part is formed between the third finishing material and the structural steel members; an air layer formed in the first, second, and third gap parts.SELECTED DRAWING: Figure 15

Description

The present invention relates to a refractory wall.

Conventionally, for example, a steel structure disclosed in Patent Document 1 has been proposed as a structure for a steel wall, a floor, or a roof having improved fire resistance while simplifying the structure. The steel structure disclosed in Patent Document 1 adopts a thin plate lightweight shaped steel having a plate thickness of less than 2.3 mm as a base material for attaching a member of the fireproof coating, and constitutes a fireproof coating including the structural frame and other parts. do. The steel structure disclosed in Patent Document 1 is said to have improved fire resistance performance by forming a fire resistant coating as a wall, floor, or roof including the structural frame and other parts.

Japanese Unexamined Patent Publication No. 2010-24811

Here, in the steel structure disclosed in Patent Document 1, rock wool or the like is sprayed on the columns or beams serving as the structural frame, and a fireproof coating material such as rock wool is formed between the columns or beams and the finishing surface material. It is filled. Therefore, in the steel structure disclosed in Patent Document 1, rock wool or the like is filled between the column or beam and the finishing face material, so that the material cost of the fireproof coating material and the filling of the fireproof coating material are to be performed. There was a problem that the construction cost and the construction period increased.

Further, in the steel structure disclosed in Patent Document 1, it is said that the fireproof coating material of the face material such as gypsum board can be attached to the column or beam to be the structural frame instead of the fireproof coating material such as rock wool. .. At this time, in the steel structure disclosed in Patent Document 1, since the fire-resistant covering material of the face material such as gypsum board is attached in contact with the column or beam, the space between the column or beam and the gypsum board or the like is provided. There is a problem that the air layer is not formed in the gypsum and the fire resistance performance of the structural frame is not sufficiently improved.

Therefore, the present invention has been devised in view of the above-mentioned problems, and an object thereof is to reduce the material cost and the construction cost of the refractory coating material in the refractory wall including the structural steel frame material. However, it is an object of the present invention to provide a refractory wall capable of improving the refractory performance.

[1] A first gap is formed between the first and second finishing materials constituting the wall surface and the first and second finishing materials, respectively, between the first and second finishing materials. It is formed in a direction intersecting the wall surface with the structural steel aggregate arranged so as to be formed, and is formed between the first and second finishing materials and the first and second finishing materials, and the structural steel aggregate does not intervene. The first is provided with an opening that penetrates the second gap and a third finishing material that faces the opening and is arranged so that a third gap is formed between the opening and the structural steel frame. , A refractory wall in which an air layer is formed in the second and third gaps.
[2] The fireproof wall according to [1], wherein the fireproof coating material is not arranged on the surface of the structural steel frame.
[3] The refractory wall according to [1] or [2], which constitutes the end wall located at the end in the girder direction of the building.
[4] The refractory wall according to any one of [1] to [3], further comprising fittings arranged in the opening.
[5] The refractory wall according to any one of [1] to [4], wherein the structural steel frame is an H-shaped steel, a square steel pipe or a circular steel pipe.
[6] The refractory wall according to any one of [1] to [5], wherein the structural steel frame material is a beam, a pillar, a brace or a wall pillar.
[7] The refractory wall according to any one of [1] to [6], wherein the first finishing material is an inner wall finishing material and the second finishing material is an outer wall finishing material.
[8] The refractory wall according to [7], wherein the inner wall finishing material is gypsum board, rock wool board, calcium silicate board, ALC board or GRC board, and the outer wall finishing material is ALC board or ECP.

According to the above configuration, a first formed between the first and second finishing materials constituting the wall surface and the structural steel frame, and between the third finishing material facing the opening and the structural steel frame. Since the air layer formed in the first, second and third gaps suppresses the transfer of heat to the structural steel frame, the material cost and construction cost for the fireproof coating material can be reduced. Further, since the temperature rise is suppressed in the event of a fire due to the presence of the opening, the heat transferred from the finishing material to the structural steel frame material can be further reduced and the fire resistance performance can be improved.

It is a perspective view of the building including the refractory wall which concerns on one Embodiment of this invention. It is a top view of the building shown in FIG. It is a figure which shows the unit element of each dwelling unit of the building shown in FIG. It is sectional drawing of the steel frame beam included in the building shown in FIG. It is sectional drawing of the steel frame beam included in the building shown in FIG. It is sectional drawing which includes the height direction and the beam-to-beam direction of the building shown in FIG. It is another example of the cross-sectional view including the height direction and the beam-to-beam direction of the building shown in FIG. It is a transparent perspective view of the column-beam joint part in the building shown in FIG. It is a perspective view of the refractory wall which concerns on one Embodiment of this invention. It is a figure which shows the arrangement example of the beam material in the refractory wall shown in FIG. It is a figure which shows the arrangement example of the pillar material in the refractory wall shown in FIG. It is a figure which shows the example which the structural steel aggregate is composed of a plurality of H-shaped steels in the refractory wall shown in FIG. It is a figure which shows the example which arranges the finishing material which does not form a wall surface in the refractory wall shown in FIG. It is a figure which shows the example of the gap part formed in the refractory wall shown in FIG. It is a figure which shows another example of the gap part formed in the refractory wall shown in FIG. It is sectional drawing which shows the shape of the opening formed in the refractory wall in one Embodiment of this invention. It is a perspective view which shows the use example of the opening formed in the refractory wall which concerns on one Embodiment of this invention. It is sectional drawing which shows the modification of the refractory wall which concerns on one Embodiment of this invention. It is a graph which shows the result of the simulation for verifying the fire resistance performance of the refractory wall which concerns on one Embodiment of this invention.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, and duplicate description will be omitted.

(Building structure)
FIG. 1 is a perspective view showing an example of a building including a refractory wall according to an embodiment of the present invention. In the illustrated example, the building 1 has a hierarchical structure and is constructed so that the plane shape is a substantially rectangular shape having two sides in the girder direction X and the beam-to-beam direction Z. The building 1 includes a floor slab 2 that divides each floor of the hierarchical structure, a girder steel beam 3 that extends in the girder direction X, an inter-beam steel beam 4 that extends in the beam-to-beam direction Z, a girder steel beam 3 that extends in the height direction Y, and a girder steel beam 3. Includes a concrete column 5 to which the inter-beam steel beam 4 is joined. Such a building 1 is used as, for example, an apartment house as described below, but the present invention is not limited to this example, and may be a hospital, a school, an office, or the like. In the present embodiment, the refractory wall 10 is arranged with a plane (YZ plane in the drawing) orthogonal to the girder direction X of the building 1 as a wall surface. The detailed configuration of the refractory wall 10 will be described later. The building 1 exemplified in FIG. 1 does not limit the structure of the building to which the refractory wall 10 according to the present embodiment can be applied. That is, as long as the refractory wall 10 is included, the structure of the building, specifically, for example, the arrangement of individual beams and columns can be appropriately changed regardless of the example of the building 1 described below.

FIG. 2 is a plan view of the building shown in FIG. On each floor of the building 1 having a hierarchical structure, a plurality of exclusive portions P such as dwelling units are arranged in the column direction X. Further, on each floor of the building 1, a balcony B that can be used from each exclusive portion P and a passage C for entering and exiting a plurality of exclusive portions P are arranged as a common portion S. The exclusive portion P is separated from another exclusive portion P adjacent to each other in the girder direction X by a door boundary wall D1 extending in the beam-to-beam direction Z in a plane. Further, the exclusive portion P located at the end of the column direction X is separated from the outside by the end wall D2. That is, the end wall D2 is located at the end of the building 1 in the girder direction X. The wall thickness of the door boundary wall D1 is, for example, about 200 mm to 400 mm, more specifically, the minimum is about 180 mm, and the standard is about 300 mm. The wall thickness of the end wall D2 is, for example, about 200 mm to 500 mm, more specifically, a minimum of about 180 mm, and a standard of about 300 mm.

Of the common areas S, the balconies B are continuously arranged in the column direction X so that they can pass through each other from the adjacent exclusive portions P in an emergency or the like. On the other hand, the passage C is continuously arranged in the girder direction X so that the passage C can enter and exit each exclusive portion P at normal times. In the illustrated example, the concrete columns 5 are arranged in the girder direction X at both ends of the beam-to-beam direction Z of the building 1. In this case, since the concrete pillar 5 is provided in the balcony B and the passage C which are the common portion S, the overhang by the concrete pillar 5 is not formed in the indoor space of the exclusive portion P. As shown in FIG. 3, between the floors of the building 1, the lower floor Fd and the upper floor Fu adjacent to each other in the height direction Y are separated by the floor slab 2, and the exclusive portion P and the exclusive portion P are separated from each other. The unit element of each dwelling unit is composed of the adjacent common area S.

4A and 4B are cross-sectional views of a steel beam included in the building shown in FIG. The girder steel beam 3 shown in FIG. 4A is an H-shaped steel, for example, the beam h ₁ is about 1000 mm, the beam width w ₁ is about 250 mm, the web plate thickness tw ₁ is about 19 mm, and the flange plate thickness tf ₁ is about 28 mm. Is. On the other hand, the inter _- beam steel beam 4 shown in _FIG . 4B is an H _- shaped steel. ₂ is about 25 mm.

5 and 6 are cross-sectional views including the height direction Y and the beam-to-beam direction Z of the building shown in FIG. As shown, between the lower floor Fd and the upper floor Fu adjacent to each other in the height direction Y of the building 1, the girder steel beam 3 arranged at the lower part of the upper floor Fu is located at the upper part of the lower floor Fd. It is placed on the upper surface of the inter-beam steel frame beam 4 to be arranged. The inter-beam steel beam 4 is erected at the upper part of each floor of the hierarchical structure between a pair of concrete columns 5 facing the inter-beam direction Z. As will be described later, the inter-beam steel beam 4 is arranged so that the entire width fits inside the door boundary wall D1 or the end wall D2. Therefore, in the present embodiment, the overhang by the inter-beam steel frame beam 4 is not formed in the indoor space of the exclusive portion P. On the other hand, the girder steel beam 3 is erected between a pair of concrete columns 5 arranged in the girder direction X at the lower part of each floor of the hierarchical structure. As described above, since the concrete columns 5 are arranged on the balcony B and the passage C which are the common areas S at both ends in the beam-to-beam direction Z, the girder steel beam 3 erected between the concrete columns 5 is also the common area S. Arranged on balcony B and passage C. Therefore, in the present embodiment, the girder steel beam 3 does not form an overhang in the interior space of the exclusive portion P.

In the example shown in FIG. 5, a brace 6 extending in an oblique direction is arranged between the inter-beam steel beam 4 of the lower floor Fd and the upper floor Fu. Further, in the example shown in FIG. 6, a wall column 7 extending in the height direction Y is arranged between the inter-beam steel frame beams 4 of the lower floor Fd and the upper floor Fu. The wall column 7 may be one in which a plurality of H-shaped steels are joined as in the illustrated example, or may be a single H-shaped steel. Further, the wall pillars 7 may be arranged through a plurality of layers of the hierarchical structure. Since the horizontal strength of the building 1 is improved by arranging the wall columns 7, the size of the inter-beam steel beam 4 is reduced in one or both of the balcony B and the passage C, or the inter-beam steel beam 4 is installed. It can be omitted. The brace 6 and the wall column 7 are, for example, H-shaped steel, and are joined to the inter-beam steel beam 4 by high-strength bolt friction joining or welding joining. The brace 6 and the wall column 7 are also arranged so that the entire width fits inside the door boundary wall D1 or the end wall D2, similarly to the inter-beam steel frame beam 4.

FIG. 7 is a transparent perspective view of a beam-column joint in the building shown in FIG. In the present embodiment, the concrete column 5 is a reinforced concrete column having a substantially rectangular cross section. In the illustrated example, the girder steel beam 3 and the inter-beam steel beam 4 are arranged below the inter-beam steel beam 4 arranged at the upper part of the lower floor Fd and the lower part of the upper floor Fu at the place where the girder steel beam 3 and the inter-beam steel beam 4 are joined to the concrete column 5. The girder steel beam 3 is joined by bolt joining, high-strength bolt friction joining, welding joining, or the like. In another example, the concrete column 5 may be a steel-framed reinforced concrete column containing a steel column such as a single H-shaped steel or a cross H-shaped steel, in which case a column-beam joint corresponding to these structures is formed. Ru.

(Structure of refractory wall)
FIG. 8 is a perspective view of a refractory wall according to an embodiment of the present invention. As shown, the refractory wall 10 includes a structural steel frame 11 and a pair of finishing materials 12 constituting the wall surface. The structural steel frame 11 is a steel frame that constitutes a structural member such as a beam, a column, a brace 6, or a wall column 7 including the inter-beam steel beam 4 described above, and is arranged between a pair of finishing materials 12. Will be done. In this embodiment, the structural steel frame 11 is an H-section steel and has a pair of flanges 111 and a web 112 as shown in FIGS. 9 and 10. When the structural steel frame 11 is a beam material such as the inter-beam steel beam 4, the flange 111 is arranged on a plane including the girder direction X and the beam-to-beam direction Z as shown in FIG. On the other hand, when the structural steel frame 11 is a column material such as a wall column 7, the flange 111 is arranged on a plane including the height direction Y and the beam-to-beam direction Z as shown in FIG. As in the example shown in FIG. 11, even if a plurality of H-shaped steels are joined by bolt joining, friction joining, welding joining, or the like at the flanges 111 of each other to form a structural steel frame 11 such as a wall column 7. good. In other embodiments, the structural steel aggregate may be a square steel pipe or a circular steel pipe.

In the illustrated example, the refractory wall 10 is applied to the end wall D2 located at the end of the girder direction X of the building 1. In this case, the pair of finishing materials 12 are the inner wall finishing material 12A and the outer wall finishing material 12B. And include. The inner wall finishing material 12A facing the exclusive portion P has a predetermined heat insulating performance such as gypsum board, rock wool board, calcium silicate board, ALC (Autoclaved Lightweight aerated Concrete) board or GRC (Glass fiber Reinforced Concrete) board. It is a fireproof plate that demonstrates. On the other hand, the outer wall finishing material 12B facing the outside of the building 1 is a dry member having a one-hour fire resistance, such as an ALC plate or an ECP (Extruded Cement Panel). The outer wall finishing material 12B may be a member called a siding material or a curtain wall. The inner wall finishing material 12A and the outer wall finishing material 12B may each be composed of a single-layer plate-shaped member, or may be configured by laminating plate-shaped members of the same type or different types from each other.

In the refractory wall 10 according to the present embodiment, the structural steel frame 11 is arranged so that the entire width fits inside the refractory wall 10, and each of the pair of finishing materials 12 (inner wall finishing material 12A and outer wall finishing material 12B). ) In the column direction X. That is, in the refractory wall 10, the structural steel frame 11 and the pair of finishing materials 12 are arranged without overlapping in the girder direction X, that is, in the direction orthogonal to the wall surface. Therefore, the overhang by the structural steel frame material 11 is not formed on the inner wall finishing material 12A and the outer wall finishing material 12B constituting the wall surface. As shown in FIG. 12, for example, it is possible to arrange the finishing material 12 that does not form a wall surface at a distance from the structural steel frame 11 in the beam-to-beam direction Z.

With the configuration of the refractory wall 10 as described above, a gap is formed between each of the structural steel frame 11 and the pair of finishing materials 12. Specifically, as shown in FIG. 13, the flanges 111 of the structural steel aggregate 11 are orthogonal to the pair of finishing members 12, that is, the strong axes α and 1 of the H-shaped steel constituting the structural steel aggregate 11. When each of the pair of finishing materials 12 is arranged so as to be substantially orthogonal to each other, a first gap portion G1 is formed between the side end portion of the flange 111 and each of the pair of finishing materials 12. In the case of such an arrangement, the structural steel frame 11 may be a narrow H-shaped steel having a flange width smaller than the flange distance (beam length). Further, as shown in FIG. 14, the flange 111 of the structural steel aggregate 11 is parallel to the pair of finishing materials 12, that is, a pair with the weak axis β of the H-shaped steel constituting the structural steel aggregate 11. When each of the finishing materials 12 is arranged substantially orthogonal to each other, a first gap portion G1 is formed between the plate surface of the flange 111 and each of the pair of finishing materials 12. Further, in each example, a second gap portion G2 in which the structural steel frame material does not intervene is formed between the pair of finishing materials 12. An air layer is formed in the first gap portion G1 and the second gap portion G2.

In the present embodiment, by forming an air layer in the first gap portion G1 and the second gap portion G2, heat transfer from the pair of finishing materials 12 to the structural steel frame material 11 is suppressed, and a fire occurs. It is possible to suppress the temperature rise of the structural steel frame 11 at the time. Therefore, it is possible to adopt a design (fireproof coating thickness 0 mm) in which a fireproof coating material such as rock wool or glass wool is not arranged on the surface of the structural steel frame material 11. Also in this case, it is possible to arrange an insulation other than the fireproof coating material, for example, glass wool or the like for the purpose of improving the sound insulation performance only, on the outer periphery of the structural steel frame material 11. The layer thickness of the air layer in the first gap G1 does not have to be large, and specifically, the wall thickness of the refractory wall 10 can be reduced by setting it to, for example, 5 mm or more and 50 mm or less.

(Opening formed in the refractory wall)
FIG. 15 is a cross-sectional view showing the shape of the opening formed in the refractory wall in one embodiment of the present invention. As shown, in this embodiment, the refractory wall 10 further includes an opening 13 and an opening finishing material 14 facing the opening 13. The opening 13 is formed in a direction intersecting (for example, orthogonal to) the wall surface of the refractory wall 10, that is, a pair of finishing materials 12 (inner wall finishing material 12A and outer wall finishing material 12B), and the pair of finishing materials 12 and It penetrates the second gap G2. Here, the fact that the opening 13 penetrates the second gap G2 means that the opening 13 does not interfere with the structural steel frame material 11. When the refractory wall 10 is applied to the end wall D2, the opening 13 penetrates the end wall D2 in the girder direction X.

The opening finishing material 14 is, for example, a fireproof plate such as a gypsum board, a rock wool plate, a calcium silicate plate, an ALC plate or a GRC plate similar to the inner wall finishing material 12A. In order to maintain the fire resistance of the refractory wall 10, a third gap G3 is formed between the opening finishing material 14 and the structural steel frame material 11, and an air layer is formed in the third gap G3. To. As a result, heat transfer from the opening finishing material 14 to the structural steel frame 11 is suppressed, and the fire resistance of the fireproof wall 10 can be maintained even if the opening 13 is formed. The layer thickness of the air layer in the third gap G3 can also be set to, for example, 5 mm or more and 50 mm or less, as in the first gap G1, so that the opening 13 can be made large. .. A fitting such as a glass window 15 is arranged at one end of the opening 13 in the girder direction X. It should be noted that the fitting such as the glass window 15 does not necessarily have to be arranged at the end of the opening 13 facing the outside of the building 1 as in the illustrated example, and the opening facing the exclusive portion P on the opposite side thereof. It may be arranged at the end of the portion 13 or at the middle portion of the opening 13. In these cases, the entire opening finishing material 14, or at least the portion on the outer side of the fitting, becomes a dry member having one-hour fire resistance such as an ALC plate or ECP similar to the outer wall finishing material 12B.

FIG. 16 is a perspective view showing an example of using an opening formed in a refractory wall according to an embodiment of the present invention. In the illustrated example, the refractory wall 10 is applied to the end wall D2, and the windows 15A, 15B, 15C are arranged by utilizing the opening 13 of the refractory wall 10 as described above. As described above, windows of various shapes can be arranged by using the opening 13 within a range that does not interfere with the structural steel frame material 11. Further, for example, in the case of the lowest floor of a building 1 having a hierarchical structure, an entrance / exit that allows access to the outside may be arranged by using the opening 13.

FIG. 17 is a cross-sectional view showing a modified example of the refractory wall according to the embodiment of the present invention. In the illustrated example, the refractory wall 10 is applied to the end wall D2 as in the example of FIG. 15, but unlike the example of FIG. 15, the floor slab 2 is extended in the girder direction X to form a so-called rotating balcony. Has been done. In such a case, it is also possible to use both of the above-mentioned pair of finishing materials 12 as the inner wall finishing material 12A. In addition, for example, even when an eave having an overhang length of 1 m or more is provided from the end wall D2, both of the pair of finishing materials 12 can be used as the inner wall finishing material 12A. Further, in the above example, the example in which the refractory wall 10 is applied to the wife wall D2 of the building 1 has been described, but the refractory wall 10 may be applied to the door boundary wall D1 of the building 1. In this case, for example, the opening 13 can be used to arrange an entrance / exit that enables traffic between the exclusive portions P in the case of a school, an office, or the like.

As described above, in the fireproof wall according to the embodiment of the present invention, between the finishing material 12 constituting the wall surface and the structural steel frame 11 and between the opening finishing material 14 and the structural steel frame 11. Since the air layer formed in the gaps G1 to G3 formed suppresses the transfer of heat to the structural steel frame material 11, the material cost and the construction cost for the fireproof coating material can be reduced. Further, as shown in Examples described later, the presence of the opening 13 suppresses the temperature rise in the event of a fire, so that the heat transferred from the finishing material 12 and the opening finishing material 14 to the structural steel frame 11 is transferred. It can be further reduced and the fire resistance performance can be improved. Further, by forming an opening forming a window or an entrance / exit, the value of a building such as the habitability of a house can be improved.

FIG. 18 is a graph showing the results of a simulation for verifying the fire resistance performance of the fire wall according to the embodiment of the present invention. In the simulation, in the above embodiment, the exclusive portion P facing the wife wall D2 is used as a fire chamber, and the wife wall D2 is a fire-resistant wall having an opening according to an embodiment of the present invention (Example), and the wife. In each case where the wall D2 is a fire-resistant wall having no opening (comparative example), the room temperature was calculated by simulation. The conditions for calculation are shown in Table 1 below, and the calculation results are shown in the graph of FIG. 18 and Table 2.

In addition, in common to the examples and the comparative examples, the ceiling and the floor are made of concrete and have a thermal inertia of 1.75 kWs ^1/2 / m ² · K, and the wall is a slight partition wall with a thermal inertia of 0.30 kWs ¹ . ^{/ 2} / m ²・ K, ceiling and wall finish is semi-incombustible material with calorific value 1.60MJ / m ²・ mm, oxygen consumption coefficient 0.20, floor finish is wood and other calorific value 8.00MJ / m ^2. mm, oxygen consumption coefficient 1.00, total calorific value of combustibles stored 52200 MJ, total calorific value of interior materials 5436.17 MJ, space factor 1.25 m ^5/2 , total area of combustibles stored 135.72 m ² , surface area of interior materials It was set to 79.22 m ² .

From the graph of FIG. 18 and the result of the simulation as shown in Table 2, it can be seen that the temperature rise of the fire chamber is smaller in the refractory wall having the opening according to the embodiment than in the refractory wall according to the comparative example. It is considered that this is due to the heat outflow from the opening formed in the wife wall to the outside. This result can be said to support that the fire-resistant wall according to the embodiment of the present invention has an opening, so that the temperature rise at the time of a fire is suppressed and the fire-resistant performance is improved.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that a person skilled in the art to which the present invention belongs can come up with various modifications or modifications within the scope of the technical ideas described in the claims. Naturally, it is understood that it belongs to the technical scope of the present invention.

1 ... Building, 2 ... Floor slab, 3 ... Girder steel beam, 4 ... Inter-beam steel beam, 5 ... Concrete column, 6 ... Brace, 7 ... Wall column, 10 ... Fireproof wall, 11 ... Structural steel frame, 12 ... Finish Material, 12A ... Inner wall finishing material, 12B ... Outer wall finishing material, 13 ... Opening, 14 ... Opening finishing material, 15 ... Glass window, 111 ... Flange, 112 ... Web, G1 ... First gap, G2 ... Second Gap, G3 ... Third gap.

Claims (8)

The first and second finishing materials that make up the wall surface,
A structural steel frame material arranged so as to form a first gap between the first and second finishing materials and each of the first and second finishing materials.
It is formed in a direction intersecting the wall surface, and penetrates a second gap portion formed between the first and second finishing materials and the first and second finishing materials and not intervened by the structural steel frame material. With the opening,
It is provided with a third finishing material facing the opening and arranged so as to form a third gap between the structural steel frame and the first, second and third gaps. A refractory wall in which an air layer is formed. The fireproof wall according to claim 1, wherein the fireproof coating material is not arranged on the surface of the structural steel frame. The refractory wall according to claim 1 or 2, which constitutes a wife wall located at an end in the girder direction of a building. The refractory wall according to any one of claims 1 to 3, further comprising fittings arranged in the opening. The fireproof wall according to any one of claims 1 to 4, wherein the structural steel aggregate is an H-shaped steel, a square steel pipe, or a circular steel pipe. The refractory wall according to any one of claims 1 to 5, wherein the structural steel frame is a beam, a column, a brace, or a wall column. The refractory wall according to any one of claims 1 to 6, wherein the first finishing material is an inner wall finishing material, and the second finishing material is an outer wall finishing material. The inner wall finishing material is gypsum board, rock wool board, calcium silicate board, ALC board or GRC board.
The refractory wall according to claim 7, wherein the outer wall finishing material is an ALC plate or ECP.

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